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第三十届中国控制会议

作者： TAO Youtian,WANG Dongyin Department of Mathematics,Chaohu College,Chaohu 238000,P.R.China

＜正＞Following the definition of a two bivariate matrix Pade-type（BMPTA） in[13],the least-squares solution to BMPTA is given and its determinantal expressions are *** avoid the computation of determinants,a recursive algorithm called Sylvester-type algorithm is *** the end the method is applied to partial realization problems of 2-D linear systems.

关键词： Matrix Pade-type approximation recursive algorithm Least-squares Determinantal expression Linear system

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REESSE Unified recursive algorithm for Solving Three Computational Problems

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Wuhan University Journal of Natural Sciences 2007年第1期12卷 172-176页

作者： SU Shenghui YANG Bingru School of Information Engineering University of Scienceand Technology Beijing Beijing 100083 China

Different from the extended Euclidean algorithm which can compute directly only the multiplicative inverse of an element in Zm^＊ and the greatest common divisor of two integers, a recursive algorithm called REESSE is designed by the authors, which can not only seek directly the multiplicative inverse and the greatest common divisor, but also solve directly a simple congruence for general solutions. This paper presents the definition and the two valuable properties of a simple congruence, analyzes in detail the reduction and recursion process of solving simple congruences, induces the recursive formula for solving simple congruences, and describes formally and implements in C language the recursive algorithm. At last, the paper compares REESSE with the extended Euclidean algorithm in thought, applicability and time complexity.

关键词： simple congruence recursive algorithm general solution multiplicative inverse greatest common divisor

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Online Aerodynamic Model Structure Selection and Parameter Estimation for Fault-Tolerant Control

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JOURNAL OF GUIDANCE CONTROL AND DYNAMICS 2010年第3期33卷 707-723页

作者： Lombaerts, T. J. J. Van Oort, E. R. Chu, Q. P. Mulder, J. A. Joosten, D. A. Delft Univ Technol Control & Simulat Div Aerosp Software & Technol Inst NL-2600 GB Delft Netherlands Delft Univ Technol Delft Ctr Syst & Control NL-2600 GB Delft Netherlands

This paper describes a new recursive algorithm for the approximation of time-varying nonlinear aerodynamic models by means of a joint adaptive selection of the model structure and parameter estimation. This procedure is called adaptive recursive orthogonal least squares and is an extension and modification of the classical recursive orthogonal least-squares procedure. This algorithm is considered to be particularly useful for indirect fault-tolerant flight control, making use of model-based adaptive control routines. After the failure, a completely new aerodynamic model can be elaborated recursively with respect to structure, as well as parameter values. The performance of the identification algorithm is demonstrated on some simulation data sets.

关键词： Adaptive Control algorithm recursive algorithm Flight Control Control Surfaces Calibrated Airspeed Angle of Attack Aerodynamic Properties GPS Angle of Sideslip Inertial Navigation System

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Convergence of the iterative algorithm for a general Hammerstein system identification

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AUTOMATICA 2010年第11期46卷 1891-1896页

作者： Bai, Er-Wei Li, Kang Univ Iowa Dept Elect & Comp Engn Iowa City IA 52242 USA Queens Univ Sch Elect Elect Engn & Comp Sci Belfast BT9 5AH Antrim North Ireland

The convergence of the iterative identification algorithm for a general Hammerstein system has been an open problem for a long time. In this paper, it is shown that the convergence can be achieved by incorporating a regularization procedure on the nonlinearity in addition to a normalization step on the parameters. (C) 2010 Elsevier Ltd. All rights reserved.

关键词： System identification Hammerstein systems recursive algorithm

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Frequency Estimation of Three-Phase Power System Using Weighted-Least-Square algorithm and Adaptive FIR Filtering

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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 2010年第2期59卷 322-329页

作者： Kusljevic, Miodrag D. Tomic, Josif J. Jovanovic, Ljubisa D. Termoelektro Enel AD Belgrade 11060 Serbia Univ Novi Sad Fac Tech Sci Dept Power Elect & Telecommun Engn Novi Sad 21000 Serbia Inst Mihailo Pupin Belgrade 11000 Serbia

A new technique for estimation of the instantaneous frequency based on simultaneous sampling of three-phase voltage signals is presented. The structure consists of two decoupled modules: the first is for adaptive filtering of input signals, and the second is for frequency estimation. A suitable and robust algorithm for frequency estimation is obtained. This technique provides better performance, compared with the technique based on a single-phase signal in relation to waveforms with noise. The technique is particularly important when asymmetric sags generate zero voltage in one of the three phases. In addition, it allows the measurement of the instantaneous frequency value of real signals for single- or three-phase systems. To demonstrate the performance of the developed algorithm, computer-simulated data records and calibrator-generated signals are processed. The proposed algorithm has been put to test with distorted three-phase voltage signals.

关键词： Adaptive filtering finite-impulse-response (FIR) filter frequency estimation frequency measurement harmonics median filter recursive algorithm three-phase power system

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A bi-objective guillotine cutting problem of stamping strips of equal circles

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INTERNATIONAL JOURNAL OF COMPUTER MATHEMATICS 2010年第12期87卷 2716-2721页

作者： Cui, Yaodong Gu, Tianlong Hu, Wei Guangxi Normal Univ Dept Comp Sci Guilin 541004 Peoples R China Guilin Univ Elect Technol Dept Comp Sci Guilin 541004 Peoples R China

Some factories use the cutting and stamping processes to divide stock plates into circles to make products. A guillotine machine cuts the plate into strips in the cutting process and then a stamping press punches out circles from the strips in the stamping process. The circles in a strip have the same size. The number of rows of circles in each strip is limited. Under these constraints, this paper addresses the following primary objective: to cut a plate by a guillotine method so that the maximal number of circles is obtained. Then the secondary objective should be optimized: the cutting layout should use a minimal number of strips. The problem is formulated as a bi-objective optimization problem and a recursive algorithm is presented for it. The computational results indicate that the algorithm can efficiently simplify the cutting process.

关键词： recursive algorithm two-dimensional cutting circle packing stamping strips

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Genetic adaptive state estimation with missing input/output data

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PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART I-JOURNAL OF SYSTEMS AND CONTROL ENGINEERING 2010年第I5期224卷 611-617页

作者： Fang, H. Wu, J. Shi, Y. Univ Victoria Dept Mech Engn Victoria BC V8W 3P6 Canada Univ Calif San Diego Dept Mech & Aerosp Engn San Diego CA 92103 USA

This paper presents the application of a genetic algorithm to state estimation for systems subject to randomly missing input/output data. By modelling the missing data in inputs and outputs with binomial processes, a modified Luenberger observer using the reconstructed data is employed for estimation. The proposed algorithm consists of two procedures: 1) Preprocessing the missing input/output data by reconstruction based on autoregressive (AR) modelling;and 2) implementing the genetic algorithm to perform on-line adaptive state estimation from reconstructed data. The effectiveness of the proposed algorithm is verified by numerical simulation.

关键词： missing input/output data genetic algorithms parameter estimation recursive algorithm

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Study on the DQPSK Demodulation Method based on Virtual Radio

Study on the DQPSK Demodulation Method based on Virtual Radi...

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2011 International Conference on Computer Science and Information Technology(ICCSIT 2011)

作者： Chen yuan Hou Xiao-min Zheng Hai-xin Wang Yuan-qin TT&C Research Center the Academy of Equipment Command & Technology Institute of Ultra-precision Optical & Electric Instrument Engineering Harbin Institute of Technology

ISBN: (纸本)9781510811249;1510811249

Discrete short time Fourier transformation (DSTFT) is a common and effective method in digital signal processing and analysis. In the most applications, amplitude information of Fourier transform is utilized instead of phase information. An algorithm based on the sliding DSTFT is presented in this paper. The demodulation of DQPSK signal is achieved using phase information in frequency domain. The principle and process of the algorithm are detail researched. The fast recursive algorithm is given under the two window functions, and the bit error rate (BER) is analyzed. The simulation shows that the DSTFT-based algorithm can get high performance, and facilitate software real-time processing. In the Gaussian white noise channel, when BER is 10 -4 , the performance of the algorithm is nearly 1dB better than the traditional differential detection method.

关键词： DQPSK Sliding DSTFT recursive algorithm all-pole window

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An Efficient Approach for Historical Storage and Retrieval of Segmented Road Data in Geographic Information System for Transportation

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Chinese Geographical Science 2010年第3期20卷 236-242页

作者： Mohammad Reza Jelokhani-Niaraki Ali Asghar Alesheikh Abolghasem Sadeghi-Niaraki Faculty of Geodesy and Geomatics Engineering K. N. Toosi University of TechnologyTehran Iran Department of Geoinformatics Engineering Inha UniversityIncheon South Korea

One of the most powerful functions of Geographic Information System for Transportation (GIS-T) is Dynamic Segmentation (DS), which is used to increase the efficiency and precision of road management by generating segments based on attributes. The road segments describing transportation data are both spatially and temporally referenced. For a variety of transportation applications, historical road segments must be preserved. This study presents an appropriate approach to preserve and retrieve the historical road segments efficiently. In the proposed method, only the portions of segments of a time stamp that have been changed into new segments rather than storing the entire segments for every old time stamp are recorded .The storage of these portions is based on the type of changes. A recursive algorithm is developed to retrieve all segments for every old time stamp. Experimental results using real data of Tehran City, Iran justify the strength of the proposed approach in many aspects. An important achievement of the results is that database volume for 2006, 2007 and 2008 within the Historical Line Event Table (HLET) is reduced by 70%, 80% and 78%, respectively. The proposed method has the potential to prevent from vast data redundancy and the unnecessary storage of entire segments for each time stamp. Since the present technique is performed on ordinary plain tables that are readable by all GIS software, special software platforms to manage the storage and retrieval of historical segments are not needed. In addition, this method simplifies spatio-temporal queries.

关键词： GIS-T dynamic segmentation change type recursive algorithm time stamp

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Simultaneous Frequency and Harmonic Magnitude Estimation Using Decoupled Modules and Multirate Sampling

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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 2010年第4期59卷 954-962页

作者： Kusljevic, Miodrag D. Termoelektro Enel AD Belgrade 11060 Serbia

A number of measurement algorithms apply orthogonal signal components obtained by two orthogonal finite-impulse-response (FIR) filters. The most significant error in orthogonal FIR digital-filter-based measurement algorithms arises due to the FIR filters having different magnitude gains at frequencies other than the nominal power system frequency. In addition, although the FIR filters show complete rejection of harmonics when the power system frequency is equal to the nominal, this is not the case for other values of the power system frequency. To alleviate this drawback, the filter parameters have to be adapted during frequency estimation. Suitable implementations of adaptive filters that allow closed-form calculation of coefficients, such as cascade FIR comb filters and resonator-based filters, are present in the literature. In this paper, the advantages and pitfalls of these two techniques are addressed with regard to computational complexity, coefficient sensitivity problems, and convergence. As a result, an improved and very suitable combined algorithm based on parallel resonators with common feedback combined with an external FIR comb-filter-based module for frequency estimation that is applied on antialiasing-filtered and decimated input signal is proposed. The obtained simulation results allow us to establish the performance of the proposed algorithm by comparing its measurement precision with the results obtained using fast Fourier transform (FFT) implementations. It has been found that the proposed algorithm is suitable for real-time applications.

关键词： Cascaded integrator-comb (CIC) filter down-sampling finite-impulse-response (FIR) comb filter frequency estimation harmonics power quality (PQ) recursive algorithm resonator filters

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